Mitsubishi Fuso CANTER FE85DE6SLGP, Shop Manual

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Replacement of valve guides
[Removal]
[Installation]
•
Install the valve guide until sits snugly on the cylinder head.
CAUTION
• The valve guides have a specified amount of depth. Make
sure to use to achieve the specified depth.
• Exhaust valve guides are longer than intake valve guides.
Make sure to install the correct type of guide in each loca-
tion.
Inspection: Contact between valve and valve seat
• Before starting inspection, check that the valve and valve guide
are intact.
• Apply an even coat of red lead to the valve contact surface of
the valve seat.
• Strike the valve once against the valve seat. Do not rotate the
valve during this operation.
• If the red lead deposited on the valve indicates a poor contact
pattern, take either of the following corrective actions.
Lapping
•
Perform lapping according to the following procedure.
• Apply a thin coat of lapping compound to the seat contact sur-
face of the valve.
CAUTION
• Do not put any compound on the stem of the valve.
• Start with an intermediate-grit compound (120 to 150 grit)
and finish with a fine-grit compound (200 grit or more).
• Adding a small amount of engine oil to the lapping com-
pound can facilitate even application.
Corrective action
Minor defect Lapping
Serious defect Reface or replace valve and valve seat
CYLINDER HEAD AND VALVE MECHANISM